"The K - ration contained three thousand
calories and was designed to be light in weight, to be carried in the soldier's pack
and to be consumed only under emergency conditions when no other food was available.
This decision to send the men into combat with the prospect of inadequate daily caloric
intake was not sanctioned by the dotors and was to play an important part in the poor
strength and general health of the Marauders."
(James E. T. Hopkins MD. - Spearhead - 1999)

After a battle "our other enemy took over:
hunger. We were perpetually famished. Not only were K rations lacking in bulk, but every
fourth or fifth day we ran out of them. We had two conditions -- one in which we felt
unfed, the other in which we were unfed."
(Charlton Ogburn Jr. - The Marauders - 1956/1959)